Improved key



y' diritta 515cm EMERY PARKER, OF NEW BRITAIN, CONNECTICUT.

Letters Patent No. 89,886, dated May 1l, 1869.

IMPRO'VED KEY.

To all whom it mag/concern.-

4tions with the improvement..

v Theinventiou herein described is applicable only to a jointed or folding key, and is limited to the peculiar construction of the joint, whereby the key, when open, is prevented from folding. l

The shank'of the key is made` in two parts, A and B. The portion A, from the bow a to the end, is split,

andmay be most conveniently and cheaply constructed by striking up blanks from sheet-metal, consisting of a bow and aside-piece, l), and uniting two such blanks put together, as in fig. 1, by means of rivets through The portion B is provided with the stein c and bit d, and its end is 4inserted between the side-pieces b of the portion A.

rThe hole in the partition B, through which the jointpin is to pass, is made oblong, as shown, so as to form' is a full, clear, and exact a slot, whose longitudinal axis is about equal in length to two diameters of the joint-pin. Upon the end of VB, near the upper edge, a score, f, is cut, the width of which is equalto the diameter'oii a iixed pin, g, which passes through the two side-. pieces b of the portion A. j

When the key is folded for carrying in the pocket, it will be in the form as seen at fig. 4. Upon opening it, the part B should, when'the key is fully extended, as in fig. 2, be pushed inward until the 'score f erna braces the pin g. So long as the parts are in this position, the joint will Vbe locked. 1

To fold vthe key, the portion B should be pulled forward, so as to clear the pin4 g, when it can be folded without difficulty.

What I claim as my invention, and desire to secure by Letters Patent, is.

The improvement, which consists in uniting. the two, parts A and B, of tbe shank of a folding key, by means of a joint, which is constructed with a slotted hole for EMERY PARKER;

the joint-pin, in combination with a fixed pin, g, andV 

